Problem RoundCube

Discussion in 'ISPConfig 3 Priority Support' started by Chowder, Oct 21, 2019.

  1. Chowder

    Chowder New Member

  2. Taleman

    Taleman Well-Known Member HowtoForge Supporter

    Are all the following requirements fulfilled?
    • host must have Internet connection with port 25 open both ways
    • host has a fixed IP-address
    • host must have A record for its IP-address (or AAAA if using IPv6)
    • you must create MX record to DNS name service for the host
    • you must get host reverse DNS name service PTR record that matches hosts FQDN
  3. Chowder

    Chowder New Member

  4. Chowder

    Chowder New Member

    In my opinion everything is fine...
  5. till

    till Super Moderator Staff Member ISPConfig Developer

    I guess the test you used checked port 25 incoming, the issue with not being able to send is smtp port 25 outgoing, so it#s the other direction. Where do you host that server and which internet connection does the server use to connect to the internet? The most likely resaon is that your internet provider or datacenter (e.g. amazon aws does it) blocks port 25 outgoing.

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